From: Kiryl Shutsemau <kirill@shutemov.name>
To: Kaitao Cheng <kaitao.cheng@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Muchun Song <muchun.song@linux.dev>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Kaitao Cheng <chengkaitao@kylinos.cn>
Subject: Re: [PATCH v2] mm/sparse: simplify the vmemmap alignment check
Date: Thu, 29 Oct 2026 14:44:04 +0000 [thread overview]
Message-ID: <auNbTHXp4o_Dqww4@thinkstation> (raw)
In-Reply-To: <20261029134521.62146-1-kaitao.cheng@linux.dev>
On Thu, Oct 29, 2026 at 09:45:21PM +0800, Kaitao Cheng wrote:
> From: Kaitao Cheng <chengkaitao@kylinos.cn>
>
> sparse_init() is called only once during boot, and the vmemmap alignment
> check is outside any loop, so VM_WARN_ON_ONCE() provides no benefit over
> VM_WARN_ON() here.
Okay, that's true. But who cares. __init section will be freed anyway.
I don't see downside in current code.
> Use VM_WARN_ON() and fold compound_info_has_mask() into its condition,
> preserving short-circuit evaluation.
Why? It only got harder to read, no?
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2026-10-29 14:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 13:45 [PATCH v2] mm/sparse: simplify the vmemmap alignment check Kaitao Cheng
2026-10-29 14:44 ` Kiryl Shutsemau [this message]
2026-10-29 15:37 ` David Hildenbrand (Arm)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=auNbTHXp4o_Dqww4@thinkstation \
--to=kirill@shutemov.name \
--cc=akpm@linux-foundation.org \
--cc=chengkaitao@kylinos.cn \
--cc=david@kernel.org \
--cc=kaitao.cheng@linux.dev \
--cc=liam@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=mhocko@suse.com \
--cc=muchun.song@linux.dev \
--cc=rppt@kernel.org \
--cc=surenb@google.com \
--cc=vbabka@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.